<!DOCTYPE html>
<html xmlns:th="http://www.thymeleaf.org">
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>Title</title>
</head>

<!-- 这个页面没用了 -->

<body>
    <span th:if="${loginFail} == 'true' " style="color: #ff0000">
        用户名或密码错误
    </span>
    <form action="/login/dgut" method="post" style="align:center">
      username:<input type="text" name="username"/><br>
      password:<input type="password" name="password"/><br>
      <input type="submit" value="提交"/><br>
    </form>
</body>
</html>